https://bz.apache.org/bugzilla/show_bug.cgi?id=61862
Javen O'Neal <one...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|NEW |NEEDINFO
--- Comment #1 from Javen O'Neal <one...@apache.org> ---
I have not tested this new caching TreeMap to see if it's faster or slower than
a regular TreeMap. TreeMap's O(log(N)) performance is probably pretty good.
The first or last key of a TreeMap containing 1,000,000 rows would traverse
through ~20 nodes (2^20=1,000,000).
The constant overhead of keeping the cache up to date for every modification
just to make firstKey/lastKey faster for getFirstRowNum() and getLastRowNum()
faster, which are probably called no more than once per sheet anyways... This
might not actually be an improvement for XSSFSheet.
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